-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7

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-2-3-(-5)(+3)-(-1.6)+(-2.7)-(-7)+(2.9)(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7-2-3-(-5)(+3)-(-1.6)+(-2.7)

-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)
(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7

-2-3-(-5) (+3)-(-1.6)+(-2.7)-(-7)+(2.9)(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
初一数学题求解!
-2-3-(-5)
=-2-3-5
=-10;
(+3)-(-1.6)+(-2.7)-(-7)+(2.9)
=3+1.6-2.7+7+2.9
=3+2.3+0.2
=3+2.5
=5.5;
(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
=-26/5+3/2-1/12-19/5+87/7
=-45/5+18/12-1/12+87/7
=-15+17/12+87/7
=-15+119/84+1044/84;
=-1260/84+1163/84
=-97/84;
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-2-3-(-5)
=-5+5
=0

(+3)-(-1.6)+(-2.7)-(-7)+(2.9)
=3+1.6-2.7+7+2.9
=10-2.7+4.5
=11.8

(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
=-26/5+3/2-1/12-19/5+87/7
=-45/5+18/12-1/12+87/7
=-9+17/12+87/7
=-756/84+119/84+1044/84
=407/84

0 11

-2-3-(-5)=-2-2+5=0

(+3)-(-1.6)+(-2.7)-(-7)+(2.9)=3+1.6-2.7+7+2.9=11.8

(-26/5)-(-3/2)+(-1/12)-(+19/5)+87/7
=-26/5+3/2-1/12-19/5+87/7
=(2184+630-35+5220)/(5x12x7)
=8069/420

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